The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 05, 1985
Filed:
Sep. 01, 1983
Hiroshi Takahashi, Yokkaichi, JP;
Teruhisa Goto, Suzuka, JP;
Mitsubishi Petrochemical Company Limited, Tokyo, JP;
Abstract
A polymer produced through ring opening of a 5-norbornene-2-carboxylate ester or a derivative thereof is dissolved in an organic solvent miscible with water and is subjected to hydrolysis by addition thereto of an alkali substance until at least a portion of the polymer is separated out. Then, water is added to the reaction mixture to dissolve the separated-out polymer, and the resulting solution is again subjected to hydrolysis treatment, which is followed by addition thereto of an acid to neutralize the resulting hydrolyzate. Thus, a polymer resin having excellent thermal resistance or a polymer resin of improved color shade or transparency can be obtained.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile